Re: Pre-PPC: class :abstract

On 2025-12-19 2:59 a.m., Ovid wrote:
> For abstract classes, they have uses, too, such as being the base class for a 
> factory and ensuring that every factory class has the required interface. They 
> do have one notable fragility, though. If you add a new abstract method, all 
> subclasses are immediately broken until they can be updated. Maybe not so bad 
> for closed source work, but bad for open source.

That problem is avoided easily enough by the abstract class having a default 
implementation, which in likely most cases would be reasonable. -- Darren Duncan